发明申请
US20050197504A1 Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-l-gulonic acid
失效
将抗坏血酸与含有抗坏血酸和2-酮-L-古洛糖酸的极性溶剂分离的方法
- 专利标题： Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-l-gulonic acid
- 专利标题（中）： 将抗坏血酸与含有抗坏血酸和2-酮-L-古洛糖酸的极性溶剂分离的方法
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申请号： US10515625申请日： 2003-07-07
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公开(公告)号： US20050197504A1公开(公告)日： 2005-09-08
- 发明人: Gerd Kaibel , Martin Merger , Thomas Domschke , Petra Deckert , Friedrich Sauer
- 申请人： Gerd Kaibel , Martin Merger , Thomas Domschke , Petra Deckert , Friedrich Sauer
- 专利权人： Basf Aktiengesellschaft
- 当前专利权人： Basf Aktiengesellschaft
- 优先权： DE10231890.5 20020712
- 国际申请： PCT/EP03/07256 WO 20030707
- 主分类号： C07D307/62
- IPC分类号： C07D307/62 ; C07D305/12
摘要：
The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.
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